Storage resizing doesn't work with SingleBinary deployment.

[mindthecap]

Storage resize in SingleBinary deployment is impossible because it's created with StatefulSets, which prohibits changing the manifest after deployment.
The affected line in code:

loki/production/helm/loki/templates/single-binary/statefulset.yaml

Lines 172 to 191 in 599a300

	{{- if .Values.singleBinary.persistence.enabled }}
	volumeClaimTemplates:
	- apiVersion: v1
	kind: PersistentVolumeClaim
	metadata:
	name: storage
	spec:
	accessModes:
	- ReadWriteOnce
	{{- with .Values.singleBinary.persistence.storageClass }}
	storageClassName: {{ if (eq "-" .) }}""{{ else }}{{ . }}{{ end }}
	{{- end }}
	resources:
	requests:
	storage: {{ .Values.singleBinary.persistence.size | quote }}
	{{- with .Values.singleBinary.persistence.selector }}
	selector:
	{{- toYaml . | nindent 10 }}
	{{- end }}
	{{- end }}

SingleBinary deployment should create separate PVC and reference it in the StatefulSet.

[mindthecap]

A workaround for this:

1. Resize the PVC and PV.
2. Delete the statefulset but keep the pod kubectl delete sts --cascade=orphan loki.
3. Redeploy Loki with helm.
4. Delete the pod to trigger volume resizing.

More info in here: https://serverfault.com/questions/955293/how-to-increase-disk-size-in-a-stateful-set